Drawing-board



R'. RABY.

DRAWING BOARD.

APPLlCATION FILED AUG. l2. 1919.

1,330,549; Patented Feb.10,1920,

2 SHEETS-SHEET l- S14/vento@ R. RABY.

nRAwmG BOARD.

APPLICATION FILED `AUG. I2, i919. 1,330,549'. Patented Feb. 10,1920.

2 SHEETS- SHEET 2.

@Mum/Lto):

AUNITED STATES- PATENT OFFICE.

RICHARD BABY, 0F LOUDON'VILLE7 OHIO.

DRAWING-BOARD.

Application filed August 12, 1919.

T0 all w/wm t may concern.'

Be it known that l, RICHARD R-ABY, a citizen of the United States,residing at Lou* donville, in the county of Ashland and State of UhiO,have invented certain new and useful Improvements in Drawing-Boards, ofwhich the following is a specification, reference being had therein tothe accompanying drawing.

The invention relates to drawing boards and has for its object toprovide a drawing board wherein a sheet of paper is easily,

' spring means comprising crossed spring wires having one of their endsembedded in the clamping member and their other ends embedded in thebody of the drawing board.

lith the above and other objects in view the invention resides in thecombination and arrangement of parts as hereinafter set forth, shown inthe drawings, described and claimed, it being understood that changes inthe precise embodiment of the invention may be made within the scope ofwhat is claimed without departing from the spirit of the invention.

In the drawings f Figure 1 is a perspective view of the drawing board.

Fig. 2 is a detail view of the upper edge of the drawing board showingthe clamping member and spring wires for actuating the same.

Fig. 3 is an enlarged detail sectional view taken on line 3 3 of Fig. 2.

Fig. 4 is a bottom perspective view of the rear or top end of thedrawing board.

Fig. 5 is a sectional view taken on line 5-*5 of Fig. 3.

Fig. 6 is a perspective view of one of thev wires showing its rightangle portions at different angles, thereby insuring a spring clampingaction on the clamping member at all times.,

Referring to the drawings, the numeral 1 Specification of LettersPatent.

Patented Feb. 1o, 1920.

Serial N0. 316,947.

designates a drawing board of conventional shape and 2 the main bodythereof. The sides 3 of the body 2 are preferably glued in channels 4 ofside reinforcing strips 5, which strips are adapted to form straightedges and at the same time prevent longitudinal warping of the body 2.

Paper is clamped on the drawing board by means of a pivotal clampingmember 6, said clamping member being hingedly connected to the bodymember 2 by means of a hinge 7, which hinge is preferably made from astrip of fabric or leather and is glued fas at 8 to the clamping member6 and as at 9 to the body member 2, thereby hingedlyA 'connecting theclamping member to said body member'. By the use of a fabric or leatherthere is a certain amount of give, thereby allowing a clamping of thepaper 10 along its entire edge. The upper end of the body member 2 isbeveled off as at 11, said bevel terminating in a preferably verticalsurface 12, which surface 12 is adapted to abut a correspondingly angledsurface 13 of the clamping member 6 at a point over a hinging pointbetween the two sections, there being a forwardly extending projection14 on the clamping member 6 which is adapted to engage the upper surfaceof the paper 10, and securely clamp the same against the bevel surface11 of the body member 2.

Spring wires 15 form spring means whereby the clamping member 6 isnormally held in closed position. These wires are crossed as at 16,thereby extending diagonally across the hinging point 17 between theclamping member 6 and the body member 2. The ends of the spring wires 15are provided with right angle portions 18, which extend into theclamping member 6 and the body member 2 and are disposed in metallicferrules 19 embedded in said members 6 and 2. The metallic ferrulesprevent the right` angle portions 18 from enlarging the holes in thewood and at the same time forml bearings for the slight movement of theangle portions 18 during a pivotal action of the clamping member 6 whenthe same is forced downwardly at its outer edge into the pockets 2Oformed at the rear ends of the channels 4, said pockets having theirinclined surfaces terminating ,adjacent the hinging point be* tween themembers 6 and 2.

To insure the positive clamping of the clamping extension 14, springwires 15 have their angle portions 18, as clearly shown in Fig. 6normally at angles to each other, thereby when the springs are placed inposition in the ferrules 19, these arms are moved to the same verticalplane thereby giving a slight twist to the bodies of the spring wires15. It will be seen that if the spring wires are 4placed in engagementwith the errules, with a twist in said wires that a positive clampingaction is assured on the paper.

Clamping members 6 may be provided with a protractor 22, said protractorbeing adapted to establish angles while drawing and may be used inconnection with a pivoted head T-square and angles.

The invention having been set forth what is claimed as new and useful isl. A `paper clamp for drawing boards comprising pivoted member pivotedto the upper edge of a drawing board, said pivotal member being providedwith an overlapping tor grasping and clamping agonally across theengaging edges ot the clampingmember and the drawing board, said springhaving one of its ends secured to the clamping Kmember near its end, itsother end being secured to the drawing board adjacent the opposite endof the clamping member, and means for securing the ends of said springwire against rotation when the clamping jaw is pivoted upwardly.

2. A drawing board comprising a body member, a. pivoted paper clampingmember hinged to one edge ot said drawing board, said clamping memberbeing provided with means for clamping the edge of a sheet of paperagainst the body member, a spring wire secured to one end oit theclamping.

member and extending diagonally across the engaging edges or theclamping member and the body member, said wire having its other endsecured to the drawing board adjacent the other end of the clampingmember, and means for securing the ends of said spring wire againstrotation so that as the clamping member is opened said spring wire willtwist thereby insuring the spring closing ot said clamping member.

3. A drawing board comprising a bedy member, a pivoted paper clampingmember hinged to one edge of said drawing board, said clamping memberbeing provided with means for clamping the edge oi a sheet of thedrawing paper, a spring wire extending dipaper against the body member,spring wires extending across each other and diagonally across theengaging edges or the clamping member and the body member, the ends ofsaid spring wire being provided with angle portions at diderent anglesto each other whereby a twist is imparted to the spring wires, aperturesin the clamping member and the body member for receiving said angleportions after they have been twisted to the same angles, said angleportion causing the twist in the spring wires to normally hold the paperclamping member in clamping engagement with the body member.

4t. A drawing board comprising a body member, a pivoted paper clampingmember hinged to one edge of said drawing board, said clamping memberbeing` provided with means for clamping the edge of a sheet of paperagainst the body member, said means cemprising a spring wire extendingdiagonally across the engaging edges oil the clamping member and thebody member, the ends of said spring wire being provided with angledportions at different angles to the body portion oit the spring` wire,whereby when said spring wire placed in position and the angle portionsthereof forced into engagement with the clamping member and the bodymember and embedded therein at the same angle, a twist will be impartedto the spring wire for imparting a clamping action to the paper engagingportion of the paper clamping member.

5. A paper clamp for drawing boards comprising a pivoted member pivotedto the upper edge of a drawing board, said pivotal member being providedwith a aw for engaging and clamping the paper against the drawing board,a spring wire extending diagonally across the engaging edges of theclamping member and the drawing board, means for securing the ends ofsaid spring wire against rotation when the clamping member is moved,lsaid hinged connection between the pivoted member and the drawing boardbeing formed from a material which will allow the spring wire to causethe clamping edge of the pivoted member to enn gage the paper along itsentire length.

In testimony whereof I hereunto aflix my signature.

RICHARD BABY.

